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US5241883A - Method of manufacturing a knife blade - Google Patents

Method of manufacturing a knife blade Download PDF

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Publication number
US5241883A
US5241883A US07/997,937 US99793792A US5241883A US 5241883 A US5241883 A US 5241883A US 99793792 A US99793792 A US 99793792A US 5241883 A US5241883 A US 5241883A
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US
United States
Prior art keywords
blade
chamfer
protuberances
edge
symmetric
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/997,937
Inventor
Michel Coppier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SEB SA
Original Assignee
SEB SA
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Filing date
Publication date
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Assigned to SEB S.A. reassignment SEB S.A. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: COPPIER, MICHEL
Application granted granted Critical
Publication of US5241883A publication Critical patent/US5241883A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B9/00—Blades for hand knives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/60—Making other particular articles cutlery wares; garden tools or the like
    • B21D53/64—Making other particular articles cutlery wares; garden tools or the like knives; scissors; cutting blades

Definitions

  • the present invention relates to a method of manufacturing a knife blade by stamping a steel blade blank.
  • the aim of the present invention is to create a knife blade making it possible to limit the cutting forces by reducing the sticking of the food to the lateral faces of the knife blade.
  • this method is characterized by the following steps:
  • said edge of the blade is sharpened.
  • the protuberances formed on the opposite faces of the blade make it possible to reduce friction with the food, when cutting, and consequently to limit the forces required from the user.
  • these protuberances make it possible to limit sticking between the food, especially fatty food, and the lateral faces of the blade.
  • the stamping creates a chamfer on one of the longitudinal edges of the blade which simplifies sharpening, since it is sufficient to sharpen the blade opposite the chamfer.
  • FIG. 1 is a plan view of one of the faces of a knife blade obtained according to the method in accordance with the invention
  • FIG. 2 is a sectional view along the plane II--II of FIG. 1;
  • FIG. 3 is a view similar to FIG. 2, after sharpening the edge of the blade opposite the chamfer.
  • the method of manufacturing the knife blade 1 represented in FIG. 1, comprises the following steps:
  • two protruding ridges 6, 7 are formed, arranged in the extension of the vertex of the protuberances 2, 3 and a chamfer 4 is formed, at least between one of these ridges 6, 7 and the longitudinal edge of the blade, after which,
  • the sharpened part is designated by the reference 5.
  • FIG. 2 it is seen that after the stamping operation, the thickest part of the longitudinal edge of the blade 1 adjacent to the chamfer 4 is delimited by two ridges 6, 7 which are situated on the two opposite faces of the blade and arranged in the extension of the vertices of the protuberances 2 formed on these two faces.
  • the sharpening burr formed on the cutting edge 8 (see FIG. 3) of the blade 1 is removed by chemical polishing.
  • the sharpening carried out on the edge opposite the chamfer 4 creates a chamfer 5 which is symmetric or non-symmetric with the stamped chamfer 4.
  • the protuberances 2, 3 are constituted by elongated, parallel raised sections whose ends and vertices are rounded.
  • the elongated raised sections 2, 3 extend in a direction forming a certain angle with the length of the blade, which is such that the ends of the elongated raised sections 2, 3 adjacent to the cutting edge 5 of the blade are further from the pointed end 9 of the blade 1 than the other ends.
  • the protuberances or raised sections 2, 3 and the chamfer 4 are preferably formed by cold forging, under a pressure of several tens of tons, between two matrices whose surface reproduces the hollowed-out relief to be formed on the faces of the steel blank of the blade.
  • the width of the protuberances 2, 3 lies between a few tens of millimeters and a few millimeters.
  • the spacing between the protuberances 2, 3 is of the same order of magnitude.
  • Some protuberances 3 are shorter than the others 2, as indicated in FIG. 1, in which the short protuberances 3 lie between long protuberances 2.
  • the knife thus produced limits, by virtue of the protuberances 2, 3, the sticking effects regarding food, especially fatty food, and thus reduces the forces required from the users.
  • two symmetric or non-symmetric chamfers are created between the two ridges 6, 7 and the longitudinal edge of the blade.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Knives (AREA)
  • Food-Manufacturing Devices (AREA)

Abstract

The method of manufacturing the knife blade (1), comprises the following steps: by stamping the two faces (1a, 1b) of a blade blank (1), a series of protuberances (2, 3) are formed, extending transversely to the length of the blade and, during the same stamping operation, a chamfer is formed on one of the longitudinal edges of the blade, after which, said edge (5) of the blade opposite the chamfer is sharpened. Use especially in order to avoid the blade sticking when cutting food.

Description

FIELD OF THE INVENTION
The present invention relates to a method of manufacturing a knife blade by stamping a steel blade blank.
SUMMARY OF THE INVENTION
The aim of the present invention is to create a knife blade making it possible to limit the cutting forces by reducing the sticking of the food to the lateral faces of the knife blade.
According to the invention, this method is characterized by the following steps:
by stamping the two faces of a blade blank, a series of protuberances are formed, extending transversely to the length of the blade and, during the same stamping operation,
parallel to one of the longitudinal edges of the blade, on both faces of the latter, two protruding ridges are formed, arranged in the extension of the vertex of the protuberances and a chamfer is formed, at least between one of these edges and the longitudinal edge of the blade, after which,
said edge of the blade is sharpened.
The protuberances formed on the opposite faces of the blade make it possible to reduce friction with the food, when cutting, and consequently to limit the forces required from the user. In particular, these protuberances make it possible to limit sticking between the food, especially fatty food, and the lateral faces of the blade.
Moreover, the stamping creates a chamfer on one of the longitudinal edges of the blade which simplifies sharpening, since it is sufficient to sharpen the blade opposite the chamfer.
Other features and advantages of the invention will further appear in the description below.
BRIEF DESCRIPTION OF THE DRAWINGS
In the attached drawings, given by way of non-limiting examples:
FIG. 1 is a plan view of one of the faces of a knife blade obtained according to the method in accordance with the invention;
FIG. 2 is a sectional view along the plane II--II of FIG. 1;
FIG. 3 is a view similar to FIG. 2, after sharpening the edge of the blade opposite the chamfer.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The method of manufacturing the knife blade 1 represented in FIG. 1, comprises the following steps:
by stamping the two faces 1a, 1b (see FIG. 2) of a blade blank 1, a series of protuberances 2, 3 are formed, extending transversely to the length of the blade 1 and, during the same stamping operation,
parallel to one of the longitudinal edges of the blade, on both faces of the latter, two protruding ridges 6, 7 are formed, arranged in the extension of the vertex of the protuberances 2, 3 and a chamfer 4 is formed, at least between one of these ridges 6, 7 and the longitudinal edge of the blade, after which,
said edge of the blade is sharpened (see FIG. 3). The sharpened part is designated by the reference 5.
In FIG. 2 it is seen that after the stamping operation, the thickest part of the longitudinal edge of the blade 1 adjacent to the chamfer 4 is delimited by two ridges 6, 7 which are situated on the two opposite faces of the blade and arranged in the extension of the vertices of the protuberances 2 formed on these two faces.
Moreover, the sharpening burr formed on the cutting edge 8 (see FIG. 3) of the blade 1 is removed by chemical polishing.
The sharpening carried out on the edge opposite the chamfer 4 creates a chamfer 5 which is symmetric or non-symmetric with the stamped chamfer 4.
In the example represented in FIG. 1, the protuberances 2, 3 are constituted by elongated, parallel raised sections whose ends and vertices are rounded.
Moreover, the elongated raised sections 2, 3 extend in a direction forming a certain angle with the length of the blade, which is such that the ends of the elongated raised sections 2, 3 adjacent to the cutting edge 5 of the blade are further from the pointed end 9 of the blade 1 than the other ends.
The protuberances or raised sections 2, 3 and the chamfer 4 are preferably formed by cold forging, under a pressure of several tens of tons, between two matrices whose surface reproduces the hollowed-out relief to be formed on the faces of the steel blank of the blade.
By way of non-limiting example, the width of the protuberances 2, 3 lies between a few tens of millimeters and a few millimeters. The spacing between the protuberances 2, 3 is of the same order of magnitude.
Some protuberances 3 are shorter than the others 2, as indicated in FIG. 1, in which the short protuberances 3 lie between long protuberances 2.
The main advantages of the method which has just been described are as follows: the whole of the blade is produced in a single stamping operation and a single sharpening operation.
The knife thus produced limits, by virtue of the protuberances 2, 3, the sticking effects regarding food, especially fatty food, and thus reduces the forces required from the users.
Needless to say, the invention is not limited to the embodiment which has just been described and numerous modifications may be applied to the latter without departing from the scope of the invention.
Hence, according to a variant, during stamping of the blank, two symmetric or non-symmetric chamfers (see dotted lines in FIG. 2) are created between the two ridges 6, 7 and the longitudinal edge of the blade.

Claims (8)

I claim:
1. A method of manufacturing a knife blade, comprising the following steps:
by stamping the two faces (1a, 1b) of a blade blank (1), a series of protuberances (2, 3) are formed, extending transversely to the length of the blade and, during the same stamping operation,
parallel to one of the longitudinal edges of the blade, on both faces of the latter, two protruding ridges (6, 7) are formed, arranged in the extension of the vertex of the protuberances (2, 3) and a chamfer (4) is formed, at least between one of these ridges (6, 7) and the longitudinal edge of the blade, after which,
said edge of the blade is sharpened.
2. The method as claimed in claim 1, wherein the sharpening burr formed on the cutting edge (8) of the blade is removed by chemical polishing.
3. The method as claimed in claim 1, wherein the sharpening which is carried out on the edge opposite the chamfer (4) creates a chamfer (5) which is symmetric or non-symmetric with the stamped chamfer (4).
4. The method as claimed in claim 1 wherein the protuberances (2, 3) are constituted by elongated, parallel raised sections whose ends and vertices are rounded.
5. The method as claimed in claim 4, wherein the elongated raised sections (2, 3) extend in a direction forming a certain angle with the length of the blade.
6. The method as claimed in claim 5, wherein the ends of the elongated raised sections (2, 3) adjacent to the cutting edge (5) of the blade are further from the pointed end (9) of the blade than the other ends.
7. The method as claimed in claim 1, wherein said protuberances (2, 3) or raised sections and said chamfer are formed by cold forging.
8. The method as claimed in claim 1, wherein, during stamping of the blank, two symmetric or non-symmetric chamfers are created between the two ridges (6, 7) and the longitudinal edge of the blade.
US07/997,937 1992-01-08 1992-12-29 Method of manufacturing a knife blade Expired - Fee Related US5241883A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9200128 1992-01-08
FR9200128A FR2685882B1 (en) 1992-01-08 1992-01-08 PROCESS FOR MANUFACTURING A KNIFE BLADE.

Publications (1)

Publication Number Publication Date
US5241883A true US5241883A (en) 1993-09-07

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ID=9425469

Family Applications (1)

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US07/997,937 Expired - Fee Related US5241883A (en) 1992-01-08 1992-12-29 Method of manufacturing a knife blade

Country Status (4)

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US (1) US5241883A (en)
CA (1) CA2086732A1 (en)
FR (1) FR2685882B1 (en)
GB (1) GB2263078B (en)

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1055258C (en) * 1995-06-28 2000-08-09 朱建林 Forging process of cold steel as handiwork
US20040129113A1 (en) * 2002-10-11 2004-07-08 Miltner Richard H. Folding knives
USD493340S1 (en) 2003-08-04 2004-07-27 Marshalltown Company Blade
US20050153641A1 (en) * 2002-10-11 2005-07-14 Miltner Richard H. Folding knives
US20100212166A1 (en) * 2009-02-23 2010-08-26 Visnack David A Hydro-tension releasing knife blade
US20120079723A1 (en) * 2010-10-01 2012-04-05 Owens Dwaine E Scraper chef knife
USD658455S1 (en) * 2011-04-21 2012-05-01 The Scott Fetzer Company Knife blade
USD678734S1 (en) 2012-05-14 2013-03-26 Columbia Insurance Company Knife
USD694072S1 (en) * 2013-03-01 2013-11-26 Sino Houseware Industries Company Limited Knife blade
USD696083S1 (en) * 2013-03-13 2013-12-24 E. Mishan & Sons, Inc. Multi-purpose knife
USD698213S1 (en) 2012-10-23 2014-01-28 Columbia Insurance Company Cheese knife
US20140173832A1 (en) * 2012-12-21 2014-06-26 John Jungwon Kim Multi-purpose kitchen knife
USD710658S1 (en) * 2013-11-01 2014-08-12 Kuo-Chang Chen Knife blade
USD710657S1 (en) * 2013-11-01 2014-08-12 Kuo-Chang Chen Knife blade
USD714104S1 (en) * 2014-01-23 2014-09-30 Progressive International Corporation Cheese knife
USD714102S1 (en) * 2013-11-01 2014-09-30 Kuo-Chang Chen Knife blade
USD766673S1 (en) 2015-11-25 2016-09-20 E. Mishan & Sons, Inc. Long narrow knife
USD766672S1 (en) 2015-11-25 2016-09-20 E. Mishan & Sons, Inc. Large knife
USD766674S1 (en) 2015-11-25 2016-09-20 E. Mishan & Sons, Inc. Bread knife
USD781666S1 (en) 2015-11-25 2017-03-21 E. Mishan & Sons, Inc. Small knife
US9975260B2 (en) 2015-04-14 2018-05-22 Darex, Llc Cutting edge with microscopically sized channels to enhance cutting performance
US10071448B1 (en) * 2010-10-11 2018-09-11 Blendtec, Inc. Method for making a mixing blade for blending apparatus
US20190160697A1 (en) * 2017-11-27 2019-05-30 Henry Johnson Pty Ltd As Trustee For The Henry Johnson Family Trust Low Sticking Friction Knife Blade and Methods of Manufacturing Same
US10471620B2 (en) * 2016-12-07 2019-11-12 The Procter & Gamble Company Knife having beam elements
US10576563B2 (en) 2018-02-03 2020-03-03 Innovations 4 Surgery, LLC Load-sharing insert for cutting blade
US11407129B2 (en) * 2018-11-02 2022-08-09 Sunbeam Products, Inc. Cutlery implement with continuous longitudinal ridge
US12049018B2 (en) * 2021-03-11 2024-07-30 World Centric Molded fiber cutlery

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3035344A (en) * 1960-06-17 1962-05-22 Edward G Brown Slicing knife

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB260028A (en) * 1900-01-01
DE441524C (en) * 1927-03-08 Wade & Butcher Corp Process for producing an elongated object with relatively thick and thin edges, e.g. B. knife blades
GB388860A (en) * 1931-11-03 1933-03-09 Hiram Herbert Longbottom Improvements in knives or blades
US3089352A (en) * 1959-09-04 1963-05-14 Massey Ferguson Sa Manufacture of knife blades
US4891885A (en) * 1987-10-19 1990-01-09 Urschel Laboratories Incorporated Method of making a knife having a scalloped cutting edge

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3035344A (en) * 1960-06-17 1962-05-22 Edward G Brown Slicing knife

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1055258C (en) * 1995-06-28 2000-08-09 朱建林 Forging process of cold steel as handiwork
US20040129113A1 (en) * 2002-10-11 2004-07-08 Miltner Richard H. Folding knives
US20050153641A1 (en) * 2002-10-11 2005-07-14 Miltner Richard H. Folding knives
US7334339B2 (en) 2002-10-11 2008-02-26 Miltner Richard H Folding knives
US7337545B2 (en) * 2002-10-11 2008-03-04 Miltner Richard H Folding knives
USD493340S1 (en) 2003-08-04 2004-07-27 Marshalltown Company Blade
US20100212166A1 (en) * 2009-02-23 2010-08-26 Visnack David A Hydro-tension releasing knife blade
US20120079723A1 (en) * 2010-10-01 2012-04-05 Owens Dwaine E Scraper chef knife
US8839524B2 (en) * 2010-10-01 2014-09-23 Dwaine Owens Scraper chef knife
US10071448B1 (en) * 2010-10-11 2018-09-11 Blendtec, Inc. Method for making a mixing blade for blending apparatus
US10537968B1 (en) 2010-10-11 2020-01-21 Blendtec, Inc. Method for making a mixing blade for blending apparatus
USD658455S1 (en) * 2011-04-21 2012-05-01 The Scott Fetzer Company Knife blade
USD678734S1 (en) 2012-05-14 2013-03-26 Columbia Insurance Company Knife
USD698213S1 (en) 2012-10-23 2014-01-28 Columbia Insurance Company Cheese knife
US20140173832A1 (en) * 2012-12-21 2014-06-26 John Jungwon Kim Multi-purpose kitchen knife
USD694072S1 (en) * 2013-03-01 2013-11-26 Sino Houseware Industries Company Limited Knife blade
USD696083S1 (en) * 2013-03-13 2013-12-24 E. Mishan & Sons, Inc. Multi-purpose knife
USD710658S1 (en) * 2013-11-01 2014-08-12 Kuo-Chang Chen Knife blade
USD714102S1 (en) * 2013-11-01 2014-09-30 Kuo-Chang Chen Knife blade
USD710657S1 (en) * 2013-11-01 2014-08-12 Kuo-Chang Chen Knife blade
USD714104S1 (en) * 2014-01-23 2014-09-30 Progressive International Corporation Cheese knife
US9975260B2 (en) 2015-04-14 2018-05-22 Darex, Llc Cutting edge with microscopically sized channels to enhance cutting performance
USD766674S1 (en) 2015-11-25 2016-09-20 E. Mishan & Sons, Inc. Bread knife
USD781666S1 (en) 2015-11-25 2017-03-21 E. Mishan & Sons, Inc. Small knife
USD766672S1 (en) 2015-11-25 2016-09-20 E. Mishan & Sons, Inc. Large knife
USD766673S1 (en) 2015-11-25 2016-09-20 E. Mishan & Sons, Inc. Long narrow knife
US10471620B2 (en) * 2016-12-07 2019-11-12 The Procter & Gamble Company Knife having beam elements
US20190160697A1 (en) * 2017-11-27 2019-05-30 Henry Johnson Pty Ltd As Trustee For The Henry Johnson Family Trust Low Sticking Friction Knife Blade and Methods of Manufacturing Same
US10576563B2 (en) 2018-02-03 2020-03-03 Innovations 4 Surgery, LLC Load-sharing insert for cutting blade
US11407129B2 (en) * 2018-11-02 2022-08-09 Sunbeam Products, Inc. Cutlery implement with continuous longitudinal ridge
US12049018B2 (en) * 2021-03-11 2024-07-30 World Centric Molded fiber cutlery

Also Published As

Publication number Publication date
FR2685882B1 (en) 1994-04-08
FR2685882A1 (en) 1993-07-09
CA2086732A1 (en) 1993-07-09
GB9227079D0 (en) 1993-02-24
GB2263078A (en) 1993-07-14
GB2263078B (en) 1994-10-26

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